Librarian gameplay (DND, but in SS14) (#17041)

* D&D character sheets

* Tabletop improvements

* Grass battlemap

* You can now put shit inside of the board

* change variable name

* make the grass tabletop better, again

* update the damn thing AGAIN

* update the shit AGAIN

* You can now take stuff out of tabletops

* Make it use parenting to avoid zany bugs

* MORE battlemaps! Battlemaps for everyone!

* You can now dump out pieces + cleanup

* All (most) non-game pieces should fall to the ground

* make the verb a bit more responsive

* Librarian content officially done

* fix tests i think

* i forgot the sheet

* Smidgen of refactoring

* You can no longer put high risk items inside of boards

* no boardgame defusal

* minor refactoring

* hoplogrma

* doc

* fix rt

Content.Server/Tabletop/TabletopSetup.cs

@@ -1,3 +1,6 @@
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
 namespace Content.Server.Tabletop
 {
     [ImplicitDataDefinitionForInheritors]
@@ -10,5 +13,8 @@ namespace Content.Server.Tabletop
         /// <param name="session">Tabletop session to set up. You'll want to grab the tabletop center position here for spawning entities.</param>
         /// <param name="entityManager">Dependency that can be used for spawning entities.</param>
         public abstract void SetupTabletop(TabletopSession session, IEntityManager entityManager);
+
+        [DataField("boardPrototype", customTypeSerializer:typeof(PrototypeIdSerializer<EntityPrototype>))]
+        public string BoardPrototype = default!;
     }
 }